Download free and public domain books on broaching and broaching practice, etc.
A treatise on the commercial application of the broaching process including different types of broaching machines, the design of broaches and examples from practice illustrating broaching methods.
BY EDWARD K. HAMMOND
NEW YORK, THE INDUSTRIAL PRESS, 1921
BY ETHAN VIALL
McGRAW-HILL BOOK COMPANY, NEW YORK, 1918
Originally broaches were principally used to finish square holes, round holes and keyways. Then gradually they began to be used for splines, irregular-shaped holes, internal gears and numerous other applications of internal finishing. Later external broaching was used for a variety of work, though so far it is used very little in comparison to internal broaching.
BROACHING MACHINES - BROACH MAKING - BROACHING OPERATIONS
MACHINERY'S REFERENCE BOOK
THE INDUSTRIAL PRESS , NEW YORK, 1914
The advantages of the broaching process are speed, interchangeability of work, adaptability to irregular forms, employment of comparatively unskilled labor, and adaptability to a great variety of work. The chief disadvantage is the high cost of broaches and the uncertainty of their life. One broach may cut 20,000 holes while another made of the same steel and tempered in the same manner may fail before 2000 are cut. While chiefly applied now to interior work, exterior work is also being successfully done, and one of the possibilities is broaching spur gears when the quantity of duplicate gears is large.